The cost of entertaining is not deductable expense for tax purposes either for you or your company. Business entertainment includes hospitality of any kind: parties, meals, rugby tickets.
If you provide customers with free food, drinks tickets or gifts HMRC says you must exclude the full cost of the event from your accounts, so you don’t get relief on anything that involves entertaining customers.
Worth remembering: Entertaining is essentially a one-sided bargain. If the customer is obligated to give something in return for the hospitality, the event becomes a two-way business transaction and is not entertaining.